Rotary clear-vision shield



Feb. 7, 1928. 1,658,172

v c. w. oLsoN v ROTARY CLEARVVISION SHIELD Filed Feb. '7, 1927 2 Sheets-Sheet l ,7m/en for r ZCAQI. VV. 01.50A/

ATTORNEY? Feb. 7, 1928.

C. w. OLSON Komm CLEAR VISION SHIELD 2 Sheets-Sheet 2 A Filed Feb. 7, 192'? TL Vnoz Ch/ WOLJON TvoeNEw/s lll Llll

Patented Feb. 7, 1928.

CARL W. OLSON, OF MINNEAPOLIS, MINNESOTA.

ROTARY CLEAR-VISION SHIELD.

Application filed February 7, 1927. Serial No. 166,529.

a nianner to prevent entrance of rain Within i the area, and to prevent deposit of. inositure upon a certain rotatably mounted transparent element, which forms a cover `tor and protectingly encircles a non-air tight element.

It has been found that in order to substantially prevent the deposit ci moisture on the outside of the rotatable t ansparent element, it is necessary to rotate the 'cover at a very high velocity, ordinarily at approaiinately tivo thousand revolutions a minute. rlhis velocity is too great and glass is often broken. I have found, however, that it a icurrent of air is brought across the outer surface in a certain inanner, the velocity oit rotation can be reduced to prevent breakage of glass, and at the saine time, the dry condition ot the element can be maintained. For this purpose, l provide a small 'lian or vane having Wings disposed substantiallyT perpendicularly to the iacc of the transpar ent element, the vane being attached centrally oi the rotating element to inove at an equal velocity therewith. The 'tan is arranged to torce the air in the saine direction as the rotation of the transparent element.

Features of the invention include an annular boxing blocking olf or circuniscribing a predetermined area of the glass; the provision of ay glass cover for the boxing, as a rotating element, overhanging but spaced 'frein the periphery ol' the boring; the provision of a transparent or non-transparent air vane or vanes, rotatable with the transparent disk, and adapted to project a sheet ot air across the outer surface of the rotating element in direction of rotation ol' said elcment; the provision of peripheral pockets upon said rotating element, as Well as nieans :lor directing a current oi air into said poel; ets torotate the element; the provision of a protective pocket into which the vision shields v ne lowered when not in "use,

i Y, said per.

bring; open at tliie top and toni to prevent accumulation of dust or snow; ol? the details of construction both of the` device and its mounting including the broader' as 1.vcll as the more specific features, and combinations and subcoinbinations of the elements.

Objects and other features of the invention will be set 'forth in the description of the drawings `forining a part of this application and in .said drawings,

Figure l a front view showing the device mounted in its casing or door;

Figure 2 is vertical section substantially on line 9.-2 oit Figure l;

Fi jure 3 is an enlarged vertical section through the clear vision device;

Figure ll is a detailed vertical section on line -il-,wd ot Figure 3 showing the construction oil the poclreted rim; and

Figure 5 is a detail view ot the air vane or fan.

The invention is shown applied to the cab `door of a railway locomotive. The numeral l designates the door having a Window 2 in its upper portion, and further having a vtraine attached at its outer side comprising a pair ot vertical parallel guides The latter I`guide being composed of' tivo pieces, the ends of which are spaced as shown to provide a. gap to receive a detent to be described below. The traine is completed by a grooved top piece 5 as Well as with a bottoni stop bar 6. These ele ments torni a. 'traine which surrounds the Windows, the parts of the frame being suitably secured, as by screws, at each sideoit, above and below the Window. The pocket S is provided below the Window, and is herein iorincd ol a sheet of Inetalbent to provide r central vertical channel for receiving and protectingly housing certain portions oli the vision shield. The pocket-forming plate is attached as by flanges l() to the vertical trarne elements 3 and 4, and has its open upper end lying directly below7 the low-er end of the `window opening.

The side pieces 3-l are grooved as at l5 and have slidably arranged therein what I herein terni a shield base plate 16 Which is slidable Within grooves l5, and when in normal position has its upper edge enw gaged Within the groove of the upper cross piece 5. Thus the base plate may be raised or lowered, and a slidable stop or latch 18 is arranged between the adjacent ends of the des fl as shown in Figure l having its bolt member projecting beneath the lower end ot the transparent base plate to positively hold the same in uppermost position. The trame element 4 is in two pieces. This latch is also adapted to engage the upper edge of the base plate when the same is in storage posit-ion in the protective pocket.

A certain area ot the plate 16 is blocked oila or circuinscribed by an annular member 25 having a beaded periphery formed by a section of split rubber tubing 26, see Figure 3. The tubing is adapted to engage the base plateand to sealingly close the annular meinber at that side, the opposite end of the member being open. The glass disk 28 is sealingly secured Within a groove or bead 2S projecting outwardly beyond the periphery of the annular Vmen'iber and forming the groove at the inner side. A post 3 0 has an inner stein portion 31 traversing the disk 28 and base plate 16 as shown. rlhis post has an integral iiange 35 engaging the disk asa stop at the outer side, and a spacer 36 is interposed betvveen the disk 28 and plate 16. A nut 38 is threaded on the shank 51 to clamp the rubber bead ot the annular member in sealing position. The post is reduced as at 37 to provide a journal and support for a transparent cover member 4.0, which is rotatably mounted on the extension, and has a rim 4-2 encircling but spaced from the annular member 25 to prevent entrance of moisture but to permit circulation oi air Within the chamber formed by the annular member, The rim 42 also has the form ot an annulus and is provided at opposite edges With beads a3, the outer bead forming a socket for receiving the glass disk at), and the inner bead providing a guard to prevent entrance oi water between the disks. The bead 29 also acts to prevent any Water which may reach the outer surface of the annulus 25, from reaching the inner surface. rlie annular member 42 is provided centrally and circumferentially with pockets 50 which in this instance are formed in a strip secured as by Welding to and around the outer surface ot the member i2. The disk is held for rotation on the extension 37 b v a ball bearing comprising an outer ball race container 5,5, having a tubular extension 56 passing through the disk Ll0, the said extension being threaded eXteriorly. rShe second container 58 is threaded on to this extension as shown and clamps the parts to the disk. In each cup member is tted a ball bearing 59. A nut 6() holds the ball bearing hub and containers in operative position.

Mounted upon the plate 16 above the rim ll2 is a pocket 7 O having arranged therein a nozzle 71 suitably arranged for delivering iuid into the pockets 50. A delivery connection 75 is shown which may be connected with the air line, as when the device is used on a locomotive.

The device as thus setup includes a circumscribed area sealed against the entrance ot moisture and capped or covered by a rotatable element spaced therefrom to permit tree circulation of air Within the box or ring-like element and provides means whereby the cover disk may he rotated at greater or lesser velocities according to the amount of moisture to be dissipated. Under certain conditions the device may he used without tur ther additions, particularlj,v vfhere high rotative velocities are unnecessary. However. it, as has been tound under certain condi tions, it is necessary to rotate the disk at very high velocities to obtain and maintain the clear vision, i provide tor the generation ot a current ci' air across the outer tace oi" the disk substantially parallel and across the face, and in direction of rotation. This means comprises an element SO as a rane or tan clampingly secured betneen the element 55 and the Jiront face ot the disk. 40 as best shown in Figure 3. This breeze-producing element is substantially. diametrically arranged shou'n and the blades Si project in a direction perpendicular to theA face of the disk and are curved and arrauged in tangent relation to a circle having its center in the axis oi rotation of the disk. By these means, a current of air can bc made to pass across the disk toward its outer periphery. lit will be noted that the eurrem runs in a direction of rotation, that is7 that it is projected in direction ot rotation. 'lfhc device provides means whereby the velocity ot' rotation ea be materially reduced to reduce the liability oi? breakage uhilc at th(l saine time clear vision can he uuiiutained as eiiiciently as when the disk is ruu at greater velocities.

l claim as my invention:

1. A device of the chier: described. conn prising a transparent buse and annular member sealingly secured hy one edge against the base. a trmisparent member mou.v ted :it the outer side oi' the annular member :ind arranged to prevent entrance ci' moisture but to permit circulation oi air tliei'cuithiii. and a vane rotatable with said transparent rotatable element at ils outer fide. the blade;`- of the. vane being arranged lo toi-cc air across the surface of the el ment in direction of its rotation.

2. E?. device oi? the class described ineluding a transparent plaie, an open end annular element sealingly engaged h v one edge thereagainst, a transparent disk engaging Within the annular element, a. journal member acting to clamp the annular element against the plate and a transparent disk rotatably mounted on said journal member and having a rim encirclingthe annular element.

3. A device ot the class described including a transparent plate an open end annular element sealingly engaged by one edge therelill against, a transparent disk sealingly secured Within the annular element, a journal member traversing plate and disk and clamping the annular' element against the plate and, a transparent disk rotatably mounted upon the journal, and having a rim encircling the annular element.

4. A device of the class described including a transparent base and an annular member sealingly secured to the base to prevent entrance of Water, and a transparent cover for said annular member rotatably mounted spaced tl ereirom and having a rim overlapping and encircling the annular member to permit circulation ot' air therewithin, and a vane attached centrally to the cover at the outer side and adapted to direct a current of air across the face of said cover.

5. A cover member igor the purpose de scribed having a breeze producing vane attached to and movable therewith substan tially at its center and arranged to direct a current of air across its tace.

G. A cover member for the purpose de* scribed having, a breeze producing vane attached to and movable therewith substantially at its center, and arranged to direct a current of air across its tace in direction oi rotation oi? the cover member.

7. A device of the class described comprising a transparent base, an annular 1nem ber having an outwardly projecting' circum 'terential intermediately arranged groove and a tubular element having one end sealingly engaging the base, a disk sealingly secured within the groove, a. post transversing the base and disk and clampingly securing the annular' member against the base, and a transparent cover member rotatably mounted on the post, and having a rim en` circling but spaced from the' annulus, said rim having pockets exteriorly.

8. A device of the class described comprising a frame having guide grooves therein, a transparent base slidable in said grooves, an annular member having one end sealingly engaging the base a transparent element rotatably mounted at the outer side of the annular member in spaced rela tion thereto and having a rim encircling the annular member to prevent entrance of moisture but to permit circulation of the air Within said member, said rim having pockets exteriorly, a nozzle mounted upon said base and arranged to deliver fluid into the pockets, and said frame having a storage receptacle arranged, and adapted to receive the base and elements thereon, and protect the same.

9. A device of the class described comprising a base, an annular member having an outwardly projecting circumferential groove, a tubular element carried by the annular member sealingly engaging the base, a dislr sealingly secured Within the groove, a post transversing the base and plate centrally and clampingly securing the annular member against the base, said post having a forward extension, and a transparent member rotatably mounted on the extension and having a rim encircling the annulus.

10. A device of the class described comprising a frame having guide grooves therein, a transparent base slidable in said grooves, and an annular member secured against the base, a transparent cover ele ment rotatably mounted at and spaced from the outer side of the annular member in spaced relation thereto and having a rim encircling the annular member to prevent entrance of moisture but to permit circulation of the air Within said member, said rim having pockets exteriorly, a nozzle mounted upon said base and arranged to deliver fluid into the pockets, and said frame having a storage receptacle arranged and adapted to receive the base and elements thereon, and protect the same.

11. A device of the class described com prising a transparent base and annular member sealingly secured by one edge against the base, a transparent member mounted at the outer side of the annular member and arranged to prevent entrance oi moisture but to permit circulation of air therewithin, and a vane rotatable with said transparent ro tatable element and its outer side, the blades oit the vane being arranged to force air across the surface of the element indirection of its rotation.

In Witness whereof, I have hereunto set my hand this 3rd day of February, 1927.

CARL W. OLSON.

lllll 

